求翻译：学校将于十二月一日在礼堂举行新年晚会，请所有学生于七点整在礼堂前集合，有不到者须向老师请假。部门：中文系。十一月三十日是什么意思？

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School will be held on 1 December, New Year's Eve party held in a hall, and invites all students in the school hall at 7:00 sharp assemble in front, there are less than are required to take leave to teachers. Department: Department of Chinese literature. On 30 November

The school will hold the new year party on December 1 in the assembly hall, please all students gather in seven in front of the assembly hall, do not have must ask for leave to teacher.Department: Chinese department.On November 30

Schools will be held on December 1 new year party held in the Auditorium, all students at seven o'clock sharp in Auditorium ago collection, with less than will be required to leave to the teacher. Departments: the Department of Chinese. On November 30